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      Question

      Find the difference between minimum and maximum value

      of 'h' such that '1h9843' is always divisible by 3.
      A 7 Correct Answer Incorrect Answer
      B 9 Correct Answer Incorrect Answer
      C 6 Correct Answer Incorrect Answer
      D 5 Correct Answer Incorrect Answer

      Solution

      A number is divisible by 3 when the sum of its digits is divisible by 3.
      Sum of digits of '1h9843' = (1 + h + 9 + 8 + 4 + 3) = h + 25.
      So, h + 25 should be divisible by 3.
      Possible values of 'h' = 1, 4, 7
      Minimum value of 'h' = 1
      Maximum value of 'h' = 7
      Required difference = 7 тАУ 1 = 6

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